Swivel office chair with seat slide system HOPE BLACK SELF-WEIGHING MECHANISM

SEAT AND BACKREST adjustable lumbar support seat upholstered with highly flexible sponge seat slide adjustment MECHANISM synchronous mechanism with multi-position lock self-weighing mechanism - adapting to the users weight "anti-shock" function - the feature controls the backrest to avoid hitting a users back smooth seat height adjustment HEADREST adjustable (up-down and front-rear) ARMRESTS adjustable (up-down) with soft (poliurethane) pads BASE AND GAS LIFT stable nylon base class 4 gas lift CASTORS soft castors for hard floor